/** Decodes and structurally validates one client-supplied base64 Yjs update. */
export declare function documentUpdateDecode(value: unknown, name: string, maxBytes: number): Uint8Array;
/** Merges already validated Yjs updates into one base64 blob without reading their content. */
export declare function documentUpdatesMerge(updates: readonly Uint8Array[]): string;
/** Decodes a server-stored base64 update that was validated when it was written. */
export declare function documentStoredUpdateDecode(value: string): Uint8Array;
/** The canonical empty-document update used to seed a new snapshot. */
export declare function documentEmptyUpdate(): string;
//# sourceMappingURL=updateCodec.d.ts.map